CHEM 220 (CHEM 220)
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Exam (elaborations) CHEM 220 (CHEM 220)
- Exam (elaborations) • 17 pages • 2021
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MODULE 8:
TEXTBOOK NOTES
(CHAPTERS 9, 10 and 11)
CHAPTER 9 → MONOPROTIC ACIDS AND BASES IN AQUEOUS SOLUTIONS
The solvent is both acidic and basic:
2H O ⇌ H O+ + OH- K = 1.0x10-14 at 25℃
pKw = -logKw = 14
Is activity important?
- Activity can be important. Normally we neglect activities in pH calculations unless it is clearly needed (ex. Titration in a 0.1M salt solution which we will not be considering)
At 25℃ neutral pH (=-log[H+]) = 7 because [H+]=[OH-] = √Kw...
Exam (elaborations)
Exam (elaborations) CHEM 220 (CHEM 220)
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MODULE 8: TEXTBOOK NOTES (CHAPTERS 9, 10 and 11) CHAPTER 9 → MONOPROTIC ACIDS AND BASES IN AQUEOUS SOLUTIONS The solvent is both acidic and basic: 2H O ⇌ H O+ + OH- K = 1.0x10-14 at 25℃ pKw = -logKw = 14 Is activity important? - Activity can be important. Normally we neglect activities in pH calculations unless it is clearly needed (ex. Titration in a 0.1M salt solution which we will not be considering) At 25℃ neutral pH (=-log[H+]) = 7 because [H+]=[OH-] = √Kw...
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